Packing



Patented Feb. 14-, 1933 p 1,8918%4 UNITE? STATES V PATENT OFFICEBENJAMIN I. HOFFMAN, OF TULSA, OKLAHOMA, ASSIGNOR- F ONE-HALF TO CHARLESS. JONES, 0F TULSA, OKLAHOIB/IA PACKING Application filed April 2, 1930.Serial No. 441,050.

My invention relates to packing and more recess and in extended bosses14 of the body" particularly to a dc *ice of that character member for apurpose presently described. for use in connection with stuiilng boxesto Mounted in transverse, internally threadseal the entrance of polishrods into well ed openings 15 of the bosses 1d are adjusta tubing. ingscrews 16, provided with operating bars,

The principal object of my invention is 17, and having bosses 18 ontheir inner ends to provide sealing members, particularly for pivotallymounting compressing plates adapted for use in stufiing boxes of theabove 19; said plates being attached to the memcharacter, that embodymeans for distributhers 16 by screws20 extended through openis inglubricant evenly over the portion of a ings 21 of the plates andthreaded concen-,

polish rod engaging the sealing member to trically into openings 22 ofthe screws 16.

prevent excessive friction and consequent The cover member 5, includes adependheating of the members. ing portion23 terminating in a lower end Afurther object is to provide sealing elewall 24 for seating engagementwith the wall 15 ments that are self-draining to prevent im- 10 of thehousing, and extending transversepairment of the members due toretention of ly through the depending portion is a rec-" lubricantstherein. tangular opening 25 for slidably receiving In accomplishingthese and other objects a pair of sealing members or blocks 26, prefofmy invention, 1 have provided improved erably formed of resilientmaterial. The

30 details of structure the preferred form of sealing members areprovided with arcuate which is illustrated in the accompanying recessesor hearing faces 27 urged into sealdrawing, wherein: ing engagement withthe polish rod by the Fig. l is a central vertical section of acompressing plates 19 moved inwardly into stufling box provided withsealing members the housing by the adjusting screws 16. 25 embodying myinvention and illustrated in Each sealing member is further preferablyoperable relation with a polish rod. provided with longitudinal ports 28and Fig. 2 is a detail perspective view of the with series of transverseports 29 communiparts of the stuffing box illustrated in diseating thelongitudinal ports with the arouassembled relation. ate recess. 30 Fig.2-3 is a perspective view of one of the Nith this construction of thesealing sealing members, particularly illustrating members, oil from thewell or other lubricant drainage grooves in the bottom end of the is fedto the polish rod through the transmember. verse and longitudinal ports,grooves 30 in Referring more in detail to the drawing: the lower end ofthe sealing member per- 1 desi nates the upper end of a well tubmittinglubricant to drain from the ports ing and 2 a section of a polish rodextending back into the tubing to prevent excessive through a stulhngbox mounted on the deterioration of the sealing members. tubing, thepolish rod connecting a string of The member 5 further includes coverporsucker rods with a pump jack or the like as tions 31 and 32 spaced byan annular rim 40 in common practice. 33 to form a chamber 34 betweenthe cover The stutfing box includes generally a housmembers. Concentricopenings 35, 86, and ing or body portion e and a cover member 5 4 37 areid d i th cover members d i the body portion being provided with a hexthlgwer e d 11 24 ti l f agonal flange 6 having an internallythreadceiving the polish rod, the openings being ed axiai opening '7 forengaging the upper slightly larger than the rod to permit freethreadedend 8 of the tubing. d f d tr vel ther throu Extending into the housingis a conical The chamber 34 serves as a reservoir for recess 9terminating in a bottom wall 10, lubricant to effect sealing relationbetween aligning sockets l1 and 12 provided with the polish rod and thesealing members,-the

59 er endicular walls 13 bein formed in the u er cover member 32 alsoservin as a P .p 2: n

shield to prevent spraying of oil from the stuffing box, after thesealing members hecome worn.

Means for securing the cover member 5 to the housing at include a pairof aligning cars 38 on the housing and a cooperating pair of ears 39 onthe cover member, openings 40 and ll being provided in said earsrespectively for receiving bolts 42, and nuts 4:3 being threaded on thebolts for clamping the parts together.

A stuffing box provided with sealing members constructed as describedmay be mounted on the upper end of well tubing, with the polish rodextending through the concentric aligning opening of the cover member.Adjustment of the sealing members in relation to the polish rod isobtained by threading the adjusting screws into or out of the bodymember. After the sealing members become worn so that adjustment is nolonger possible they may be readily replaced by new blocks.

Due to the perforations in the sealing members, lubricant is distributedevenly over the entire portion of the polish rod engaging the blocks,thereby preventing excessive friction and consequent heat which wouldrapidly deteriorate the rubber or other composition sealing members.

Lubricant which would also tend to impair the blocks if permitted toremain in.

the perforation during shut-down of the equipment is free to drain backinto the well through the lower vertical ports and lower grooves. WVhilethe sealing elements have been disclosed as used in a specific type ofstuffing boxes it is obvious that they may also be installed in variousother types of boxes to produce similar results. 7

What I claim and desire to secure by Letters Patent is:

1. A rectangular packing element having a bearing face, and having aplurality of longitudinal openings and transverse ports communicatingsaid openings with the bearing face.

2. A packing element having a bearing face and a lower end face, saidelement having a longitudinal opening, a port leading from the openingthrough said bearing face, and a groove in said lower face communicatingwith the longitudinal opening.

3. A resilient packing element of the character described, having abearing face and a lower end face, said element having a longitudinalopening, a series of ports leading from the opening through said bearingface, and a groove in said lower face communieating with thelongitudinal opening.

4. A resilient packing element having an arcuate face, a plurality oflongitudinal openings and a series of transverse ports leading from eachlongitudinal opening through said arcuate face.

5. A resilient packing element having an arcuate face and a lower endface, said element leaving a plurality of longitudinal openings, aseries of transverse ports leading from each longitudinal openingthrough said arcuate face and a series of'grooves in said lower facecommunicating with the longitudinal opening.

6. A resilient packingelement of the character described, having abearing face and a lower end face, said element having a groove in itslower end face, and a port leading from said groove through the hearingface.

7 A resilient packing element of the character described, having abearing face and a lower end face, said element having a plurality ofgrooves in its lower end face, and ports leading from each of saidgrooves through the bearing face.

In testimony whereof I afiix my signature.

BENJAMIN P. HOFFMAN.

